Dianne Feinstein, the senior Democratic senator from California, has signed on as a sponsor of the STATES Act, a federal marijuana legalization bill now pending in the U.S. Senate. Sen. Elizabeth Warren (D-Mass.) introduced and Sen. Cory Gardner (R-Colo.) cosponsored the Strengthening the Tenth Amendment Through Entrusting States, or STATES, Act in June of this year. If passed, the bill would amend the Controlled Substances Act so that it is no longer applicable to statutes “relating to the manufacture, production, possession, distribution, dispensation, administration, or delivery of” cannabis, according to the text of the measure.

On Thursday, Feinstein became the tenth senator to join as a cosponsor of the legislation, according to Senate records. Requests from High Times for comment from Sen. Feinstein’s press representatives have not yet been answered.

Other senators supporting the bill include Democrats Sen. Cory Booker of New Jersey and Sen. Michael Bennet of Colorado, and Republicans Sen. Lisa Murkowski of Alaska, Sen. Rand Paul of Kentucky, and Sen. Jeff Flake of Arizona. Sen. Warren has predicted that the measure will come before the full Senate for a vote if the Democrats are able to regain control of the legislative body in November’s upcoming elections.